Suppose that N = 12 resistor have just come off the production line. Also assume that a = 3 are defective (have serious defects). Thus b = 9 are defect-free. A sample of n = 5 are selected and tested to see if they are defective. Let X = the number defective refrigerator in the sample (?:{0,1,2,3}). a) Find the probability mass function of X and draw its graph. b) Find the expected value of the defective refrigerator for this case (i.e. in the case with 12 refrigerators have produced in a line)
Suppose that N = 12 resistor have just come off the production line. Also assume that a = 3 are defective (have serious defects). Thus b = 9 are defect-free. A sample of n = 5 are selected and tested to see if they are defective. Let X = the number defective refrigerator in the sample (?:{0,1,2,3}). a) Find the probability mass function of X and draw its graph. b) Find the expected value of the defective refrigerator for this case (i.e. in the case with 12 refrigerators have produced in a line)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Suppose that N = 12 resistor have just come off the production line. Also assume that a = 3 are defective (have serious defects). Thus b = 9 are defect-free. A sample of n = 5 are selected and tested to see if they are defective.
Let X = the number defective refrigerator in the sample (?:{0,1,2,3}).
a) Find the probability mass
b) Find the expected value of the defective refrigerator for this case (i.e. in the case with 12 refrigerators have produced in a line).
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